SPONSORED LINKS

BCM limp mode

Tiny
DW96
  • MEMBER
  • 2003 BUICK RENDEZVOUS
  • V6
  • AWD
  • AUTOMATIC
  • 150,000 MILES
Is it necessary to reset/reprogram the BCM when you replace the airbags

And after an overheat how do you get the computer to get out of limp mode.I've already replaced the water pump on it
Thursday, February 11th, 2016 AT 5:19 PM

13 Replies

Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Try disconnecting the battery for about 20 minutes and see if that does anything for you.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Thursday, February 11th, 2016 AT 5:23 PM
Tiny
DW96
  • MEMBER
  • 8 POSTS
JohnnyT73 do I need to reprogram the BCM after replacing the airbags
Was this
answer
helpful?
Yes
No
Thursday, February 11th, 2016 AT 5:26 PM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
To my knowledge you do not.
Was this
answer
helpful?
Yes
No
Thursday, February 11th, 2016 AT 5:28 PM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
You may need to erase the codes in the BCM. If it continues to set codes then there is still fault.
Was this
answer
helpful?
Yes
No
Thursday, February 11th, 2016 AT 5:29 PM
Tiny
DW96
  • MEMBER
  • 8 POSTS
Thank you for helping a fellow technician (student technician) out
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Thursday, February 11th, 2016 AT 5:29 PM
Tiny
DW96
  • MEMBER
  • 8 POSTS
That would mean a wiring issue most likely a short correct?
Was this
answer
helpful?
Yes
No
Thursday, February 11th, 2016 AT 5:33 PM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Thats usually how airbag circuits work. They function by causing shorts in the system. If you can pull the codes it should guide you in the right direction. If the airbags deployed and you replaced the airbags then if the car has pretensioners in the seatbelt(s). They pay have discharged as well and need replacing. Check codes first though.
Was this
answer
helpful?
Yes
No
Thursday, February 11th, 2016 AT 5:36 PM
Tiny
DW96
  • MEMBER
  • 8 POSTS
Stupid question.I haven't been a tech for long. How would you check the pretensioner to see if it had deployed
Was this
answer
helpful?
Yes
No
Thursday, February 11th, 2016 AT 5:41 PM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
It's kinda hard to describe so that it makes sense. You will have to visually see it in the car. The part that the seat belt connects to is usually about a 5-6 inch cable coming out of the pretensioner body. If it looks like it's pulled into the body then it has discharged. The codes will tell you if the pretensioner is short circuited.
Was this
answer
helpful?
Yes
No
Thursday, February 11th, 2016 AT 5:57 PM
Tiny
LUCKYONE
  • MEMBER
  • 1 POST
I got a 2004 Buick rendezvous it stopped on me wouldn't jump off when I got it home changed starter didn't help but left it unhooked from battery now found inside car 30 amp metal fuse bad do I need to reset bcm cause I now don't have low beam head lights window want work doors locks don't work so what cause that
Was this
answer
helpful?
Yes
No
Sunday, February 25th, 2018 AT 6:33 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
It sounds like the BCM has had a problem could be from a voltage spike when the battery was connected.

You will need the BCM reprogrammed by a shop here is the location.

Please let us know what happens.

Cheers, Ken
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Wednesday, February 28th, 2018 AT 11:23 AM
Tiny
LUCKYONE
  • MEMBER
  • 1 POST
Thanks I got it fixed it was the wires got cought in the seat rail and cut them caused a direct short.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Thursday, March 1st, 2018 AT 7:58 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help. Send a pic of the damage if you can :)

Cheers, Ken
Was this
answer
helpful?
Yes
No
Thursday, March 1st, 2018 AT 10:49 AM

Please login or register to post a reply.

Related Engine Computer Limp Mode - Reduced Power Content

Reduced Power - Limp Mode
GUIDE
Reduced Power - Limp Mode
The computer system that controls your car has a built in safety feature called "Reduced Power" or "Limp Mode" which is designed to get the car where it is...
VIEW MORE

Sponsored links